Engine



' (Nd Model.)

11W. HAMMON.

'BNGINE.

Patented Jan. 28, 1896.

AN DREW EGRAHAM. PHOTOU'MQWASHINGWH. D C

NITEED STATES PATENT Fries,

EDIVIN IV. IIAIWIMON, OF DAVISVILLE, CALIFORNIA.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 553,613, dated January 28,1896.

Application filed June 10,1895. Serial No. 552,306. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWIN \V. HAMMON, a citizen of the United States, residing at Davisville, county of Yolo, State of California, have invented an Improvement in Engines; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to that class of reciprocating engines which, on account of the shape of the cylinder, are known as sectorshapec engines.

My invention consists in the novel constructions which I shall hereinafter fully describe and specifically claim, and the objects of which are to provide such a shape in crosssection of the sector-cylinder that will adapt it for the best and most effective packing of the shaft and piston, and also to provide for the necessary clearance at the ends of the cylinder.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a side elevation of my e11- gine. Fig. 2 is a longitudinal section on line y y of Fig. 3. Fig. 3 is a cross-section on line x w of Fig. 2.

A is the cylinder of my engine, which has the general shape longitudinally of a sector of a circle, both ends of the cylinder being closed and tight. The shape in cross-section of this cylinder, as far as its interior surface is concerned, is curvilinear or approximately spool-shaped with the surface curving continuously from the sides toward the middle. At its middle it is cut out in as narrow a slot a as may be, in order to receive the hub or collar 0 of the arms a, to which thepiston 13 is secured. This piston corresponds to the shape of the interior of the cylinder and is suitably packed around its periphery, as shown at I). It has for its center of movement the shaft 0, which passes at right angles under the cylinder in a casing D, and said shaft has mounted fixedly upon it the collar or hub 0. Packing (Z' and glands d are fitted upon the shaft 0' within the casing and bear up against the hub or collar 0 thereon, and these, in connection with a packing (i set up against the shaft at the junction of the collar 0 with the cylinder slot, by means of'a set-screw d serve to render the cylinder tight. The shaft is mounted in outer fixed bearings d, and its by reason of their bases extending approximately tangentially to the lower portion of the shaft, so that the piston in reciprocating from side to side is given sufficient clearance at the lower portion of the ends, and in this clearance portion there is room for the ports a, as shown.

In sector-shaped engines, generally, it has been very difficult to provide for the proper packing of the shaft. It is obvious that in cylinders having straight side walls or rectilinear in cross-section, the shaft in entering its lower portion and passing through it from side to side must be very extensively and consequently very carefully packed. This can not be done successfully and the packing of such a shaft is defective; but by having the interior cross-section of the cylinder curvilinear it is obvious that the shaft can pass through below the cylinder and that the opening by which it is connected with the interior piston may be made as narrow as may be desired and consistent with the strength necessary to operate the parts. It is also easy to pack the shaft at each side of this narrow opening and at the line of the junction of the hub of the piston-carrying arms with the end walls of the cylinder. It is also better adapted for the peripheral packing of the piston itself.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an engine, the combination, of a cylinder having in the direction. of its length, a sector-shape, and a curvilinear shape in crosssection, a casing secured beneath the cylinder said cylinder having a narrow slot in the longitudinal central plane of its bottom, a shaft mounted in fixed bearings in the casing, and receiving the hub of the piston arm and packing fitted upon the shaft within the easing, and bearing up closely against the opposite sides of the hub or collar.

2. In an engine, the combination, of a cylinder having in the direction of its length, a sectorshape, and a curvilinear shapein crosssection with a slot in the longitudinal middle plane of its bottom, a piston conforming to the shape of the cylinder, in cross-section, an arm extending from the piston and having a hub or collar fitting and adapted to play in the said slot, a casing secured beneath the cylinder, having outer fixed bearings, a shaft passing through said bearings, and adapted to oscillate, and having the collar or hub fixed upon it, and means for rendering the cylinder tight consisting of the packing on the shaft on opposite sides of the collar or hub and glands on said shaft adapted to press the packing up against the opposite sides of the collar or hub.

In an engine, the combination of a cylinder having in the direction of its length,a sector-shape and a curvilinear shape in cross section with a slot in the longitudinal middle a collar or hub fitting and adapted to play in the slot of the cylinder, an oscillating shaft passing under the cylinder, in a casing secured thereto, and having the collar or hub fixed upon it, the packing rings surrounding the shaft Within the casing, one on each side of the collar or hub, with their inner portions in contact with opposite sides of the collar or hub, glands within the casing and engaging with the outer portions of the packing, a pack in g (1 set up against the shaft at the junction of the collar or hub with the cylinder slot and means for adjusting the packing (2 In Witness whereof I have hereunto set my hand.

EDlVIN \V. HAMMON. lVit-nesses:

S. H. NOURSE, H. F. AscHEcK. 

